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初中《动物学》“昆虫纲”一节教材以蝗虫为代表,讲述了本纲动物的形态、结构、生理、生殖和发育的特点,并比较详细地介绍了直翅目、鳞翅目、膜翅目和双翅目等四个目动物的有关知识。由于口器是昆虫纲分目的重要依据之一,在教材内容上既是重点又是难点,因此处理好这一教学内容有助于教学任务的完成。昆虫的口器多种多样,教材中提到了咀嚼式、虹吸式、
Junior high school “zoology” “Insecta” a section of textbooks to locusts, told about the shape, structure, physiology, reproduction and development of the characteristics of the animals, and more detailed introduction of the Orthoptera, Lepidoptera, membrane Tetraoptera and Diptera and other four animals related knowledge. Because the mouthpart is one of the important bases for the purposes of the Insect Division, it is both an important point and a difficult point in the contents of the teaching materials. Therefore, to handle this teaching content is very helpful for the completion of the teaching task. Insect mouth a wide range of devices, textbooks mentioned chewing, siphon,